Synthesis, Crystal Structure and Cyclic Voltammetry of a Copper(II) Complex with Tripod Ligand Tris(2‐benzimidazolylmethyl)amine

Abstract

A five‐coordinate copper complex with the tripod ligand tris(2‐benzimidazylmethyl)amine (ntb), with composition [Cu(ntb)(H2O)](ClO4)2 · C6H7NO · H2O (C6H7NO=4‐picoline‐N‐oxide), was synthesized and characterized by means of elemental analyses, electrical conductivities, thermal analyses, i.r., and u.v. The crystal structure of the copper complex has been determined by a single‐crystal X‐ray diffraction method, and shows that each copper ion is linked to a tris(2‐benzimidazylmethyl)amine (ntb) and a water molecule, resulting in it being five‐coordinate with an N4O ligand set. The coordination geometries of the copper ion may be best described as a distorted trigonal bipyramid, with C 3 molecular symmetry. Cyclic voltammograms of the copper complex indicate a quasireversible Cu+2/Cu+ couple.